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Kitchen & Bath Remodel Budget Calculator

June 30, 2026 • By the Investor Sam Editorial Team • Reviewed by Berly Sam Varghese, Editor
A common rule keeps a kitchen remodel to roughly 10 to 15% of your home value and a bathroom to about 5 to 10%, so you do not over-improve for the neighborhood. This calculator turns your home value and a chosen budget percentage into a target spend, then layers on a contingency reserve — because remodels almost always uncover surprises behind the walls. The result is a realistic all-in budget rather than the optimistic sticker price contractors quote.

Example: Home value: 400000 $ · Room: 1 · Budget (% of home value): 12 % · Contingency reserve: 15 %

Recommended budget$48,000
Budget with contingency$55,200
Contingency reserve$7,200

Worked example

For a $400,000 home, budgeting a kitchen at 12% of value targets $48,000. Adding a 15% contingency — about $7,200 — brings the realistic all-in budget to roughly $55,200. That reserve is what covers the outdated wiring, the water damage under the sink, or the cabinet upgrade you decide on mid-project, none of which appear in the original quote.

Frequently asked questions

How much should a kitchen remodel cost?

A widely used guideline is 10 to 15% of the home value for a kitchen. Spending far more risks over-improving relative to what buyers in your area will pay; spending far less may not deliver the update you want. This tool lets you dial in the percentage.

Why do I need a contingency reserve?

Remodels routinely uncover hidden problems — old plumbing, electrical that fails code, rot, or asbestos — plus scope changes you decide on as work progresses. A 10 to 20% reserve keeps a surprise from stalling the project or blowing your finances.

Should a bathroom budget be a smaller percentage?

Yes. Bathrooms are smaller and typically warrant about 5 to 10% of home value. Choose the room and set the percentage accordingly; whole-home renovations can justify a much larger share.

Will I get this money back at resale?

Partly. Kitchens and baths are among the better-recouping projects, but you rarely recover the full cost. Use a renovation ROI estimate alongside this budget if resale value, not just enjoyment, is your goal.

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Sources

Berly Sam Varghese · Editor, Investor Sam

Berly Sam Varghese is an engineer who treats money the way he treats any hard problem — something to be engineered, not gambled on. He funded years of education and built real financial stability the patient way, by living below his means and investing rather than borrowing. He writes for the person trying to make a home a sound decision, not just a purchase. He reviews and approves every article on Investor Sam and checks the figures against primary sources before anything is published. More about our standards.